The best answer would be: That by using a new toothbrush you get the best results from group 3. It would appear that a used toothbrush sterilized or not, is less effective that a new one.
Answer:
I am sorry that I am not your age.... hope you get friends.. and your not lonely to anymore.. Have a good day!!
Answer:
yes and no
Explanation:
man kind is very advanced but at the same times it's not because we know many things about technology and the human body and animals and many more we have advanced throughout the years and overcame many of things all because of what we know but at the same time man kind has been wrong about many things